INDEX 



323 



Epigastric artery, 163, 179 



Epigonal organ, 190, 300, 303; artery to, 

 190; relation of, to rectal gland and 

 testes, 300 



Epiphysis, 233; development of, 233 



Erythrocytes, 170 



Ettnopterus, light organs of, 29-30 



External branchial apertures. See Gill 

 clefts 



External carotid artery, 164, 180 



External filaments of embryo, 148, 151, 

 152 



External flexor muscle, 95, 110-112 



External form, 5-7, 8-16; in development, 

 10-12 



External mandibular (VII) nerve, 243; 

 divisions of, 243; ganglion of, 243 



External (posterior) rectus muscle, 90, 

 100; nerve to, 100, 223-224, 241; origin 

 of, 99 



Extrabranchial cartilages, 47, 67, 69; re- 

 lation to gill septum, 69, 149 



Extrahyal cartilage, 67, 69 



Extraseptalia, 69 



Extravisceral cartilages, 47, 67, 69 



Eye, 5, 258, 266-270; development of, 

 269; muscles of, 89-90, 99-100; orbit 

 of, 58; pupil of, 258; structure of, 267- 

 269 



Eyeball, 60, 258; muscles to, 89-90, 99, 

 101 



Eyelid, 5, 258, 267; muscles to, 102; mov- 

 able, in ScyUium, 267 



Eye muscles, 89-90, 99-100, 258; develop- 

 ment of, 99-100; nerves to, 221, 223, 

 240, 241, 242 



Facial nerve, 224, 241-242; divisions, 224, 

 241-242; nucleus of, 241; sensory fibers 

 of, 241 



Fallopian tube, 304, 310 



Fasiculi lateroventrales, 235 



Fasiculi longitudinales mediales, 235 



Femoral artery, 169, 192 



Femoral vein, 202, 213 



Fenestrae, 43, 55, 271 



Fibrillae of nerve, 238 



Filaments. See Gill filaments 



Fins, 1; anal, Heptanchns, 6, 12; ancestral 

 type of, 14-16; caudal, Meptanchus, 6, 

 12; dorsal, Heptanchus, 6, 12, 13; form 

 and position of, 12-16 ; function of, 12- 

 14 



Fin-fold theory, 14-15, 247 



Fin spine, 33; development of, 33-34; 

 parts of, 33 



Foramen of (foramina): abducens nerve, 

 44; 60; anterior cerebral vein, 44; dor- 

 sal plate, 48; dorsal root nerve, 48, 

 246; facial, 44, 60; intercalary plate, 

 48; internal carotid artery, 53; inter- 

 orbital canal, 44; magnum, 57; oculo- 

 motor nerve, 44, 60 ; ophthalmicus pro- 

 fundus nerve, 43, 60; ophthalmicus su- 

 perficialis (VII) nerve, 44, 60; orbito- 

 nasal canal, 44; optic, 44, 60; pectoral 

 girdle, 49, 81; pelvic girdle, 51; ramus 

 anastomoticus artery, 44 ; trochlear, 44, 

 60; ventral root nerve, 48, 246 



Forebrain, 230 



Formatio-reticularis, 237 



Fossa rhomboidalis, 235 



Fourth ventricle, 222, 235, 236 



Funnel (nephrostome), 296 



Funnel of oviduct, 290 



Galeus, color of, 26 



Gall bladder, 124, 137 



Ganglion: gasserian, 240, 241; geniculate, 

 242, 243; habenular, 236; oculomotor, 

 240; ophthalmicus profundus, 240; 

 ophthalmicus superficialis (V), 240; 

 sympathetic, 247-248 



Gastric artery, 166-167, 187 



Gastric juice, 135 



Gastric veins, 200, 201 



Gastroduodenal artery, 166, 167, 188 



Gastrohepatic artery, 166, 186 



Gastro-pancreaticosplenic artery, 188 



Gastrosplenic vein, 201 



General cutaneous nucleus, 236 



Genital glands, 290 



Genital organs: of female, 290, 291, 303- 

 309; of male, 290, 291, 300-303 



Genital ridge, 300 



Genital system, 290-291, 300-309; rela- 

 tion of, to urinary system, 292 



Germ cells, 300 



Germinative layer of epidermis, 23 



Gill. See Holobranch 



Gill-arch theory of Gegenl)aur, 14-15 



Gill clefts, 5, 11, 132, 147, 148, 150; in Hep- 

 tanchus, 147; in rays, 150; in Squatina,9 



Gill filaments, 147, 148, 149, 151, 152, 154, 

 173, attachment of, 149, 151; blood to, 

 153, 157, 175; circulation in, 157; em- 

 bryonic, 148, 152; on spiracular pocket, 

 153 



